1871867052657 has 48 divisors (see below), whose sum is σ = 3135557792640. Its totient is φ = 1053987572736.

The previous prime is 1871867052637. The next prime is 1871867052661. The reversal of 1871867052657 is 7562507681781.

It is not a de Polignac number, because 1871867052657 - 2²² = 1871862858353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 1871867052594 and 1871867052603.

It is not an unprimeable number, because it can be changed into a prime (1871867052637) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 730618 + ... + 2068220.

It is an arithmetic number, because the mean of its divisors is an integer number (65324120680).

Almost surely, 2^{1871867052657} is an apocalyptic number.

It is an amenable number.

1871867052657 is a deficient number, since it is larger than the sum of its proper divisors (1263690739983).

1871867052657 is a wasteful number, since it uses less digits than its factorization.

1871867052657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337942 (or 1337939 counting only the distinct ones).

The product of its (nonzero) digits is 39513600, while the sum is 63.

The spelling of 1871867052657 in words is "one trillion, eight hundred seventy-one billion, eight hundred sixty-seven million, fifty-two thousand, six hundred fifty-seven".